For Questions use the following narrative
Narrative: Aspirin and polyps
A study done by the Ohio State University Medical Center examined whether or not taking an aspirin a day would help colon cancer patients reduce the chance of getting subsequent colon polyps.635 patients with colon cancer participated; 317 of them were randomly assigned to the aspirin group, and the other 318 patients were assigned to a placebo (non-aspirin) group.54 patients in the aspirin group developed subsequent polyps, compared to 86 patients in the non-aspirin group.Many confounding variables were controlled for in this well-designed randomized experiment.
-{Aspirin and polyps narrative} What are the odds of developing subsequent polyps for colon cancer patients who don't take an aspirin a day?
A)86 to 318
B)86 to 54
C)86 to 232
D)None of the above

Question

Quizplus · Accepted Answer

The odds of developing subsequent polyps for patients not taking aspirin is calculated by comparing those who developed polyps (86) to those who did not (318 total in the non-aspirin group minus the 86 who developed polyps, which equals 232).

For Questions Use the Following Narrative